has also been reinforced by the increasing availability of drugs.
             Drugs can be defined as chemical substances which, when introduced to the body, can alter the bio-chemical systems of the body. All drugs however produce their own side effects. There are many different types of drugs with different effects on the body available for athletes to use to improve their performance.
             Stimulants e.g. amphetamines, effect the central nervous system and the cardiovascular system and are used to reduce tiredness and increase alertness, competitiveness and aggression. They occur naturally in substances such as caffeine and nicotine but are banned in sport as they give competitors a physical and mental advantage.
             On the other hand, there are also many disadvantages to taking stimulants. They can cause dehydration and blood circulation can decrease. There can also be a rise in blood pressure and body temperature and an increased and irregular heartbeat can occur as a result of using them and in extreme cases the heart and lungs can stop w
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